Example usage for java.util Collection size

Introduction

In this page you can find the example usage for java.util Collection size.

Prototype

int size();

Source Link

Document

Returns the number of elements in this collection.

Usage

From source file:Main.java

public static boolean isEmptyArray(Collection collection) {
    return collection == null || collection.size() == 0;
}

From source file:Main.java

/**
 *  Returns <code>true</code> if the passed collection is either <code>null</code>
 *  or has size 0./*from w ww. ja  v  a2s.co m*/
 */
public static boolean isEmpty(Collection<?> c) {
    return (c == null) ? true : (c.size() == 0);
}

From source file:Main.java

public static boolean isNullOrEmpty(Collection collection) {
    return collection == null || collection.size() == 0;
}

From source file:Main.java

/**
 * Check is a collection is not empty/*from   w  w w. j  av  a2 s  . c o m*/
 */
public static boolean isNotEmpty(Collection<?> cl) {
    return ((cl != null) && (cl.size() > 0));
}

From source file:Main.java

public static int[] toIntArray(Collection<Integer> is) {
    int[] out = new int[is.size()];
    int index = 0;
    for (Integer i : is)
        out[index++] = i;/*  w ww .jav a 2  s  .c o  m*/
    return out;
}

From source file:Main.java

public static <E> E getElementAtIndex(Collection<E> set, int idx) {
    if (idx >= set.size() || idx < 0) {
        throw new IndexOutOfBoundsException();
    }/*from www  . j a  v a2  s  .  co  m*/
    Iterator<E> it = set.iterator();
    for (int i = 0; i < idx; ++i) {
        it.next();
    }
    return it.next();
}

From source file:Main.java

public static boolean isEmpty(Collection collection) {
    return (collection == null) || (collection.size() == 0);
}

From source file:Main.java

public static int randomIndex(Collection<?> collection) {
    return new Random().nextInt(collection.size());
}

From source file:Main.java

public static <E> boolean isNotEmpty(Collection<E> collection) {
    return collection != null && collection.size() != 0;
}

From source file:Main.java

public static boolean isListEmpty(Collection collection) {
    if (collection == null || collection.size() < 1)
        return true;
    else/*from   w  w  w. j a v a2 s  . c  om*/
        return false;
}